Supporting-clamp for sewing-machine motors.



C. H. BEACH.

suPPoasNG cLAMPfoR sewmc; MAcHmE Momma APPLCTION FILED )UNE 2i. |915.

Patented July 9, 1918.

2 SHEETS-SHEET I.

C.,H. BEACH. SUPPORTING CLAMP Foa SEWING MACHINE Mamas.

APPLICATION FILSD IUNE 2i. |915.

Patented J uly 9, 19MB.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT oEEIcE.

CHESTER BEACH, 0F RACINE, WISCONSIN. ASSIGNOR TO WISCONSIN ELECTRIC QQMANY, OF RACINE, WISCONSIN, A CORPORATION OF WISCONSIN.

BUPFORTINGvOLAMP FOR SEWING-MACHINE MOTORS.

Specification of Letters Patent.

Patented July 9, 1918.

Application tiled June 21, 1915. 8eria1No.35,350.

To all whom it may concern Be it known that I, CHESTER H. BEAGH, citizen of the United States, residin at Racine, in the county of Racine and btate of Wisconsin, have invented a certain new and useful Improvement in Supporting` Clamps for Sewing-Muchine Motors, of which the following is n full, clean, concise, andexaet description,

My invention relates to improvements in means for mounting sewing machine motors or other small motors.

The object of the invention is to provide a combined sewing machine motor and supporting bracket or clump, which muy be readily applied to und removed from the top et' the usuel sewing machine without necessitating any change in the latter or mutilating the wood of the table top.

In the accompanying drawings, 1 have il` lustrated two embodiments of my invention. The invention may be embodied in other forms, however.

Figure 1 is u side elevation of u motor and its support, properly positioned with respect to the head of the sewing machine by means of projections which lit into the two belt holes, the usual sewin driving belt being dispensed with and n short driving belt being used instead.

Fig. 2 is u top plan view of the sup rt.

Fig. 3 is e side elevation of e mo ified forni of motor and its support, the latter having one projection fitting into one of the belt holes and smother pro]ection engaging the edge of the table top, the motor being adapted to drive the standard sewing machine belt. t

Fig. 4 is u top plan view of the support, the motor being shown in dotted outline.

In Figs. 1 and 2, the table or to of the machine is indicated by` reference c aracter 1 and is provided Wit the usual openings 2. 3 through which the driving belt passes when the machine is operated by the foot trendle. These openings provide convenient points of attachment for the motor support or clamp, which, in the form illustrated, comprises two metal plates 4, 5 havin sliding engagement with each other. Sai membersare provided with downward and im werdly bent extensions 6, 7 constituting jaws whic project through the holes 2, 3 and grip e wood t0 secure the clamp in machine g plate. These jaws are preferably oilset, whereb' the members 4, 5 do not cover the belt ho es, but leave them substantially unobstrueted. The member 5 is provided -with addltlonal extensions or ears 8 which are bent upwardly to provide supports for a pm 9. A coiled spring 10 is secured at one end to said pin 9, and at the other end to a vertical post 11 carried b the member 4. The latter member slides between said in und the member 5 and is confinedI there etween and also b'etween the vertical extensions or ears 8 whereby it is guided in its movement. The spring 10 constitutes the means for drawing the jaws 6, 7 together, and also maintains them in yielding engagement with the walls of the openings 2, 3. Suitable stops 12, 13 are rovided on the member 4 to limit the slidmg movement.

The outer or rear end of the metal plate 5 is bent to form a hook 14 which may be conveniently grasped by the finger when it is desired to extend the spring 10 either in locating the clamp on the table or in removin it. Said member 5 is provided also with e. sterol extension 15 consistin of the horizontal portion of a substantie, lyU shaped plate, which is secured thereto. The Vmember 5 and the lateral extension 15 constitute what may be termed en Lshaped supporting plate for the motor. The upright side members 17, 18 of the plate 15 provide bearings for a rod 4or in 19 about which the motor 20 is pivoted said motor being provided with n pair of downwardly extending supports 21 having openings therein through which said rod 19 passes. The motor, which may be of any suitable type, carries a pulley 22 in uiinement with the pulley 23 on the on, the latter having a hub or extension 27.

` a. drum about which a cord 28 i constitutm is wrappe to'a greater or less'extent, the.

end of the oord being secured to seid drum.

The disk 26 has a resilient contact arm 29 carriedl thereby which erung; '1s edepted. td

travel over a series of stationary contacts 30 connected with the successive steps of a resistance, the latter being inclosed within the cylinder 31. The structure described. constitutes a combined speed controlling rheostat for varying the speed of the motor and a switch for starting and stopping it. The cord 28 passes over a pulley 32 mountedV on the pin 9, said cord passing downwardly through the unobstructed opening?) and being connected to the foot treadle ot' the machine (not shown) whereby the speed of the motor is varied by pressure of the o erators footon said treadle. The pressure o the foot is resisted by a second spring 83 coiled about the shaft 19 and tending to turn the rheostat in such direction as to stop the motor. t

In order to prevent the clamp from injuring the woodwork, suitable rubber pads 34, 35 are provided on the undersides of the members 4, 15 respectively, whereby all the metal parts are raised above the surface of the wood and out of Contact therewith.

It will be seen that the clamp permits the mo'tor to be securely held in place on the machine in a convenient position toward the rear of the table whereby it is out of the Way of the operator. It also insures proper alinement ofthe driving wheel and the driven wheel. The motor is clamped in place without-boring additional holes in the wood or otherwise injurin the table-top.

1n the form of t evice shown in Figs. 3 and 4, the motor is so arranged as to drive the 'usual belt which connects the lower pulley with the upper pulley of the machine. It is supported preferably to the rear of the head of the sewing machine, as in the firstI form of device illustrated, the elevation in Fig. 3 being the opposite side of the motor, as com- ,rared to Fig. 1. The motor 41, which may be of any suitable type, hasY secured upon the underside of its base one member 42 o f a clamp. The member 42 is L-shaped and the foot of the L is provided with a transverse slot 43 which receives a screw 44 by which said member 42 and a base-plate 45 are attached to the underside of the motor-frame. Said member 42 extends rearwardly from the motor, and hence the slot 43 permits of the motor beinp adjusted to a slight extent either forward or rearwardly in order to locate the motor-shaft pulley 46 in proper position with respect to the driving belt 47 of the sewingr machine. The member 42, at its elbow, is provided with a downwardly extendin portion 48, constitu-tin r one of the jaws of gli clearly in Fig. 3, projecting through the o enin 49 provide( in the table-top 50 for tllije heliJ 47, without interfering with 'said belt. At its rear end the member 42 is provided with a headed stud 51 which passes through a slot 52 in the other member 53 e clamp, said jaw, assiown most t of the clamp, thereby holding the two members 52 and 53 together, with the member 53 slidably longitudinally of the member At its rear end the member 53 is provided with a downwardly extending jaw 54 adapted to engage over the rear end of the table-top, and affording a convenient hook to be grasped by the hand when positioning the motor on thc table, or when removing it. A coiled spring serves to hold'the jaws 4S and 53 in clamping relation with'the tabletop 50. It will be seen that by merely pulling the jaws 48 and 54 apart and inlsorting.;` one ot' the jaws in the opening 49 and lowering,r the other over the rear edge of the table-top and then releasing the jaws` the tension olE the spring 55 will securely clamp the motor in position upon the ma' chine.

The groove in the periphery of the motorshaft pulley 4G is in position to receive the driving belt 47 ol' the machine, said driving belt normallyy extending into the groove but out of operative engagement with said pulley. That is to say, the periphery of the pulley 46 is in .substantial alinement with the peripheries o; .he hand wheel pulley 56 and the belt-pulley (not shown) of the sewing machine. Pivoted upon the end of the motor-frame, near the base thereof, is a lever 57 which extends upwardly and is curved rearwardly over the motor-shaft. At its free end the lever 57 carries a pulley 58, adapted, when the lever 57 is operated, to engage the belt 47 and move the same into operative relation with the pulley 4G. The pulley 58 thus controls the operative engagement of the belt 47 with the pulley 46, whereby the driving of the belt 47 by the pulley 4G and the speed at which the sewing machine is driven are dependent upon the position of the pulley 58. When the pulley 58 is out of engagement with the belt. 47, said belt is out of cooperative relation with the pulley 4G. The lever 57 is normally held by a spring 59 in the inoperative position shown in Fig. 3. A chain 60, secured at onel end to the lever 57 and at. its other end to the treadle (not shown) of the machine, permits of the lever 57 being operated through the medium of the treadle and being held at any position of its operation. The treadle may be, and preferably is,'the usual foot treadle of the machine. The chain G0 tends over a guide-pulley 61 conveniently mounted upon the member 53 of the clamp, and the portion of the chain 60 which runs over the pulley is preferably in the form of a coiled spring 62 which provides a more suitable running surface and at the same time renders the chain 60 somewhat yielding. By suitably ulling upon the chain ('10- t e belt 47 may e more or less tightened with respect to the pulley 46,:theroby controllingr the speed at which the sewing machine is driven. The method of control eliminates the necessity for a l'heostat.

It will be understood that when the motor is utilized for operatin the sewing machine in the manner just described, the usual connection between the drive-wheel of the sewing machine and the treadle will be made inoperative, such connection as is well known, consisting of a pitman extending from the treadle to the crank-shaft of the drive-wheel. If it be desired to operate the machine by foot-power in the usual manner, this may be done merely by restoring the operative connection between the treadle and the drive-wheel and disconnecting the lower end of the chain from the treadle. The po sition of the electric motor is such that it does not interfere with the "driving of the machine by foot-power, though it may be readily removed l'roin the tabletop and with equal readiness be replaced when desired.

Although the two forms of motor-supporting bases disclosed are designed partic ularly for use in connection with sewing machine able-tops'having belt holes already arranged therein, it is obvious that awhere a portable motor is to be mounted on Lome other form of support, the necessary ole or holes can be bored in the support. t is also apparent that various changes may .g e made in the constructions described without departing from the spirit of the inven- -tion.

The claims of the present application are directed more particularly to the combinag ion of the motor and its supporting clamp.

he structure shown in Figs. 3and 4 1s claimed morespecitically in my co-pending application 155,593, filed March 17, 19,17.

Some of thefeatures illustrated herein are claimed in my Patent 1,252,317, issued January 1st, 1918, Sewing machine motors.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. The combination with a sewing machine havin a head, and a tableprovided with belt holes, of an electric motor adapted to drive said head, and a base on. which said motor is mounted, said base having a projecting member which fits into one of said belt holes to aid in alining the motor with the head of the sewing machine.

2. The combination with a sewing machine having a head, and a table rovided with openings therein, of an electric motor adapted to drive said head, and a. base on which said motor is mounted, said base having relatively adjustable projecting hooksha, l members which, in coperatlon with one of said openings, serve to clamp said base and said motor to said table.

3. The combination with a sewing machine `having a head and a table, of an elec- `tric.motor adapted to drive said head, and

an L-shaped base, said motor being mounted on one arm of said base, the, other arm of said base having projecting members which cooperate with said table to aline the motor with the head of the sewing machine.

l. The combination with a sewinr nmchine having a head comprising a riveli wheel and a supporting shaft therefor and a table provided with belt holes, of an electric motor having a base supported on the rear of said table, said motor being arranged with its armature shaft substantially parallel to said supporting shaft, and means associated with said base constituting a clamparranged substantially in alinemcnt with said belt holes, part of which clamp engages the rear belt hole to properly pos!- tion said motor with respect to said driven wheel.

5. The combination with a sewing machine having a driven wheel, a shaft there,- for, a supporting standard, and a table provided with belt holes, of an electric motor having a base restingr on said table to the rear of said standard, said motor having an armature shaft substantially parallel to said first shaft Iand having a drivin wheel` thereon arranged substantially in tie plane of said driven wheel and said base having means for engaging said rear belt hole to maintain said motor in roper position with respect to said driven wlieel.

f3. The combination with a sewing machine having a table with belt holes therein, a driven wheel, a shaft carrying the same and a supporting standard therefor, of u portable motor havingr a base with cushioning material on the bottom thereof to preY vent mai-ring of said table and to insure friction, said base resting on said table adjacent to one of said belt holes with the armature shaft of the motor substantially parallel to said first shaft, means on said armature yshaft whereby said motor may drive said driven wheel, and means coperating with said' belt hole to maintain said motor in place.

7. The combination with a sewing machine huving a head, and a table provided with belt holes, ofia small portable electric motor having a base supported on said, table between said head and the rear of said table, and equipped with rubber pads bo prevent marring said table, said base bein sub stantially parallel to said rear edge an having an extension arranged at right angles thereto, said extension having a spring cooperating with relatively movable projecting members, constituting a yielding clamp to hold sa'id motor in place.

8. The combination with a sewing machine' having a head and a Itable provided with an openin therein, of a slnallportable electric motor ving a base su ported on said table adjacent to said hea said base having i'ubber pads to prevent marring said table` being substantially parallel to the rear edge thereof, and having' an extenf sion arranged at right an fles thereto, said extension having relativey movable projeeting members constituting a clamp to hold said motor in place, one melnber engaging the wall of said opening, the other I to drive said head, and a base on which said motor is mounted, said base having rojecting members fitting into said belt lioles to aline the motor with the head of the sewing machine.

11. The combination with a sewing machine havin a head, and a -table provided with belt lio es, of an electrical motor adapted ito drive said head, and a base on which said motor is mounted, said base having projecting, hook-shaped, members, fittin into said belt holes and 1being relatively a t justable to clamp said base and said motor to said table.

12. The combination with a sewing machine having a head, and a table provided with belt holes, of an electric motor adapted to drive said head, and an L-shapcd base, said motor being mounted on one arm of said base, the other arm of said base having projecting members fittin into said belt holes to aline the motor with the head of the sewing machine.

13. The combination with a sewing machine having a head, and a table provided with belt holes, of an electric motor adapted to drive said head, and an L-shaped base said motor bein mounted on one arm et said base, the ot ier arm of said base hav ing projecting, hook-shaped members fit ting into said belt holes and being relatively adjustable to clamp said `base and said motor to said table.

14. The combination with a sewing ma chine havin a head, and a table provided with belt ho es, of an electric motor adapted to drive said head, and an L-shaped base, said motor being mounted on one arm of said base, the other arm of said base having projecting, hook-shaped members fitting into said belt holes, one of said projecting members being stationary, and means for moving the other of said projecting members to clamp said base and said motor to said table.

15. The combination with a sewing machine havin a head, and a table provided with belt ho es, of an electric motor adapted to drive said head, and a base on which said motor is pivotally mounted, said base having relatively movable members consttilting a'clamp, one of which members eo operates with a belt hole to aline the motor with the head of the sewing machine.

16. The combination with a sewing machine having a head, and a horizontaltable provided with belt holes, of a base member supported on said table with rubber inter posed between the two to prevent marring said table, a horizontally arranged pivotal member supported by said base, a motor above said pivotal member and mounted thereon whereby it may rock about said pivot to etl'ect a driving connection with said head, and means on said base for positively engaging a substantially vertical wall of said table to prevent slipping of said motor on said table.

17. Tliecombination with a sewing ma chine having a standard, a rotatable shaft supported thereby, a' wheel to be driven mounted on said sha-ft, and a table provided with belt holes, of an electric motor having a driving wheel thereon arranged substantially in the plane of said driven wheel, a pivotal support for said motor, abase carryiig said'pivotal support, a spring biasing said motor to., driving position, said base restin on said table between said standard and t e rear edge of said table, and means on said base cooperating with one of said belt holes to positively `position said motor` 18. A portable driving means for sewing machines comprising an electric motor, a base upon which said motor is mounted, said base having means thereon for clamping it to a sewing machine table between the wall of one of the belt holes therein and another wall thereof, said motor being pivotally mounted on said base. 19. A portable sewing machine motor comprising a base having rubber pads and having clamps thereon, one of which is arranged to fit within one of the belt holes, the other of which is arranged to engage another vertical wall of the sewing machine table, a horizontal rod supported above said base and a motor having a pair of downwardly projectin arms through which said rod passes, where y said motor is pivotally supported above said base.

20. The combination with a sewing machine, of portable driving means therefor,

coniprisin an electric motor having a downwar y projectiiig bracket, a. horizontal su porting rod assing through the lower en of said brac et, means for supporting said rod above the table top and a clamp at right angles to said rod for holding the latter in proper driving position.

21. The combination with a sewing machine, of portable driving means therefor comprising an electric motor having a pair of downwardly extending arms thereon and havin openings near the lower end thereof, ya iorizontal rod passing through said openings constituting a pivotal support for said motor, a pair of brackets sup )orting the opposite ends of said rod, and a ase of which said brackets constitute a part, said bas"having means engaging one of the belt holes of the sewing machine table to position said motor.

22. The combination with chine havin a head and a table provided with belt bois, of an electric motor adapted to drive said head, and a base for said motor, said base having a forward extension comprising relatively slidable members, each of which has an oii'set downwardl)r projecting jaw adapted to fit in one of the belt-holes, whereby said members do not overlie and obstruct said belt holes, and a spring for drawing said jaws toward each other to clamp the base to the table.

23.A The combination with a sewing maa sewing ma- 'chine having belt holes in the table` of an electric motor, and means for aid motor in driving relation to the machine, said means comprising relatively movable members, downwardly extending projections on each of said members arranged in alinement with said belt holes, resilient means normally biasing said members toward each other, and an extension on one of said members arranged to be grasped by hand to Separate said members against the action of said resilient means in installing or removing said motor.

24. The combination with al sewing machine comprising aytable with belt holes, and head includingianvheel mounted abolita horizontal axis, of a motor arranged with its armature shaft parallel to said horizontal axis and having a base resting on said table between the rear edge thereof and the rear belt hole, said motor being'pivoted to said base about an axis also parallel to said supporting 'first axis, .a downwardly extending hook fixed to said base, and a slidable member having a second hook at its forward end and having means at the other end arranged to be grasped by hand to manipulate said hook.

25. The combination with a sewing machine, of an electric motor, and means for pivotally supporting said motor in driving,r position, saidmeans comprising a pair of projecting hooks, and means proJectin rearwardly from the forward hook, wiereby the latter may be manipulated.

26. The combination with a sewing machine, of an electric motor, pivotally supporting said motor in driving position, said means comprising a support and means for' with a pair of projecti members, and manually operative means or adjusting the relation of said members horizontally.

27. The combination with a sewing machine having a head, and a table provided with belt holes, of a base member having rubber feet supporting it on said table in elevated position, a motor pivoted to said base about a horizontal axis, a pair of hookshaped members associated with said base, one of which is arranged to engage a belt hole, resilient means to move said hooks loward each other, and a handle projecting to the rear of the rearmost hook for the puff por ot' manipulating the forward hook.

28. The combination with a sewing nur chine havin a head, and a table provided with belt ho es, of a motor alined with said head, a base supporting said motor, a forward extension on said base, downward projections on said extensions arranged to en ter said belt holes, and flexible controlling means extending from said motor through one of said belt holes.

29. The combination with a sewing machine having a head including a hand wheel and a groovcd pulley and a table with belt openings, of a .sewing machine motor, a base therefor, a pivotal support for said motor arranged above said base, a grooved pulley on said motor, a driving belt con necting said grooved pulleys, an extension on said base arranged in alinement with said belt holes, oiiset hooks 4.extending down wardly from said extension into said belt holes, a pulley on said extension arranged over the rear belt hole, and fiexble controlling means extending from said horizontal pivot over said pulley and down through Said belt hole.

30. The combination with a sewing machine having a head, and a table provided with belt holes, of an electrical motor adapted to drive said head, means for controlling` ,said motor, a base on which said motor is supported, said base having a projection en gaging one of said belt holes, a Hexible member for said controlling means, and means for guiding said flexible.member through a belt hole.

31. The combination with y chine havin a head, and a table rovidcd with belt holes, of an electrica mot-or adapted to drive said head, means for con trolling said motor, a iexible member for said means, and a base on which said motor is mounted,said base having projecting hook-shaped members fitting into said belt holes and being relativel adjustable to clamp said base and saidy motor to Sgid table, and Ineens for supporting said ilexible member in vertical alinement with one of said belt holes, whereby said member may pass thercthrou h.

32. The combination with a sewing maa sewing machine havin a head of an electrical motor adapted to rive said head, a base on which said motor is mounted, said base having adjustable projecting members constituting a clamp, means for controlling said motor, a flexible member for said means, and a pulley on said clamp arranged above one of said projecting members for guiding said flexible member.

33. The combination with a sewing machine having a head, and a table provided with belt holes, of an electric motor adapted to drive said head, and a base for said l motor, said base comprising a pair of longi- "tudinally slidable plates, one overlapping the other, means connecting Said plates, hclamping jaws extending downwardly from "said plates, a coiled spring for sliding said jaws toward ach other, and means tor hm` itmg said sliding movement.

34. The combination with a sewing maf chine having a head, and a table provided with belt holes, of an electric niotor adapted to drive said head, and a base for said motor, said base having a forward extension comprising relatively slidable members, each having a downward hook adapted to enter one belt hole, and means for moving said hooks toward each other to clamp the table between said belt holes, whereby said motor and its base are supported on said table to the rear of said belt holes.

35. The combination with a sewing machine motor bracket and a table-top having openings therein, of means for pivotally mounting a motor on said bracket, yielding means tending to move said motor about said pivot in order to maintain the belt ten- Sion, jaws on said bracket arranged to enter said openings, and resilient means drawing said jaws toward each other.

36. A motor support comprising an extension on the motor frame, a plate having supporting arms thereon, a rod passin through said extension and said arms, an forming a pivotal Support for the motor, said rod serving also as a switch actuatin means, and jaws associated with said plate `or securing said motor to a support.

A support for a motor comprising a pair of parallel projections thereon, 'a base plate having a second pair of parallel projections arranged adjacent to said first pair, a freely rotatable rod passing through said projections and constituting a pivotal support for the motor, said rod constituting also n rheostat controlhng means, means on said base plate for gripping a support and pads .for elevating said plate above said support.

B8. A-sewing machine motor support comprising parallel projections on the motor frame. a base plate having a pair of upright arms near one end thereof, a rod passing through said arms and said projections and constituting a pivotal support for said motor, a motor rheostat mounted on Said rod and controlledv by the rotation thereof, a pair of coiled springs on said rod, one of which tends to rotate the rheostatarm, and the other of which tends to swing the motor about ils pivot, means on said plate for dctachably securlng the latter to a support and means for rotating said rod.

In Witness whereof, I hereunto subscribe my name this 17th day of June, A. D. 1915.

CHESTER H. BEACH. 

